Tool for reaming valves and valve seats



Oeh. 27, 1925. 1,558,825

L. O. BEARD TOOL FOR REAMING VALVES AND VALVE SEATS Filed May 31. 1923 2 Sheets-Sheet 1 /J il' i @uw zo f la /f Patented Oct. 27, 1925.

untreu :stares LAWRENCE o. :Ba-Ann, or timmeren, PENNSYLVANIA 'root sonneri-Mine vntvts aan vanvn seams.

Application 'filed May 31, 4923. Serial No."1642,621.

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Be it known that Lawn-.nnen O. Brenn, a citizenloft'he United 4States of America, residing at Lancaster, in the county of Laneaster and State of Pennsylvania, has invented certain new and useful Improvements in Tools for Reaming Valves and Valve Seats, of which the following is a specification.

The object of my invention is to provide a simply constructed and conveniently operable tool for reaming valves and valve seats.

Other and more specific objects will be in part apparent and in part described as the specification is proceeded with.

In the accompanyingl drawings forming part of this specificati-on:

Figure 1 is a side elevation of the improved reamer;

Figure 2 is a longitudinal section through same showing reamer in valve seat;

Figure 3 is a bottom plan view of reamer;

Figure 4t is a top plan View of reamer;

Figure 5 is a detail view of handle;

Figure 6 is a perspective view of the ratchet;

Figure is a sectional view of reamer in position on a valve; and

Figure 8 is a detail section of the bushing.

Referring more particularly to the drawings wherein the same reference numerals denote like parts throughout the several views 5, represents a concave-convex reamer having the concave upper face or cavity 6, and the conical lower face or extremity 7, provided with cutting teeth 8 and 9 respectively. The teeth 8 and 9 are preferably inclined at a slight angle to the axis, of the reamer from top to bottom to form a left hand rather than a. right hand helix, thereby providing a much more effective cutting action and furthermore eliminating all chattering when in use.

The outer periphery of the reamer 5, is serrated as at 10, to provide a convenient hand grip in rotating the same when reaming a valve seat 20. However in actual practice the reamer when used for the purpose just stated is rotated in the following manner:

A cylindrical ratchet member 11, formed on one end of a post 12, is provided with a concave lower end or extremity formed with teeth 14, inclined and spaced similarly to the spacing and inclination of the teeth 8,

in 'the concave portion 6, `of the -reamer :5. The reamerf, is centrally bored ras iat'15, the walls `of the bore tapering :inwardly from top to bottom thereof and the top of the bore being formed with an enlargement 16 A guide stem 17, passes through a conical bushing 18, adapted to snugly seat in the bore 15`y of the reamer, the lower end of the stem extending down through the opening 19, in the valve seat 20, and the upper end of the stem adapted to .tit loosely into the centrally disposed bore or recess 21, formed in the lower end of the cylindrical ratchet member 11. A set screw 13, having a hexagonal opening 30, in the head thereof clamps the stem 17` in place.

When the parts are assembled in the manner just described and as best illustrated in Figure 1, the teeth 1li, of the ratchet member 11, engage the teeth 8, of the reamer, in position to ream the valve seat, both sets of teeth "8 and 14 during this operat-ion merely serving as ratchet teeth. Consequently when thepost 12, is rotated in a clockwise direction by means of the handle 22, fitting' in the aperture 23, of the post, the reamer 5, is rotated correspondingly thus causing the teeth 7, to ream the valve seat. The handle 22, is detachable and is preferably provided with a hexagonal end 24, adapted to fit in the opening 30, to facilitate removal or insertion of the set screw 13. It will be understood that the member 11 and the stem 17, are free to move longitudinally of the reamer and consequently may be freely rotated in an anticlockwise direction without communicating movement to the reamer 5.

In reaming valves such as the 'valve 25, illustrated in Figure 7, the conical bushing 18, is inserted in the bore 15, of the reamer 5, and the valve stem 26, is then passed through the bushing and the valve stem is then held stationary by inserting the same in a vice or any suitable means (not shown). The reamer 5, is pulled rmly against the valve 25, and rotated by hand to ream the valve. l

Having thus described my invention, what 1 claim is:

1. A reamer comprising a cylindrical member having a concave cavity and a conical extremity, said cavity and said extremity formed with cutting teeth, a ratchet member having a concave extremity formed with teeth spaced and inclined similarly to the teeth in said cavity, the teeth on said ratchet member adapted to engage the teeth in said cavity to rotate said cylindrical member when said ratchet member is rotated in one direction and means for rotating said ratchet member.

2. A reamer comprising a cylindrical member having a cavity and a conical eX tremity each provided With cutting teeth, a removable member seated in said cavity, said removable member having means for engaging the teeth in said cavity, and

means for rotating said removable member.

3. A reamer comprising a cylindrical member having a cavity at one end and a conical face at the other end, the end having said cavity being formed with ratchet teeth, and the conical face being formed With cutting teeth, and a member having teeth adapted to engage the ratchet teeth for rotating said cylindrical member.

In testimony whereof I affix my signature.

LAWRENCE O. BEARD. 

